I have been printing math mammoth pages for a while – and I too am considering buying from the sale. I have been printing off a section at a time, in color with the draft setting turned on. I will just print off the whole book if I use this again, though, because even if we don’t do every problem, we do some on each page. I am still trying to get a feel for how much ink I am using with this new color inkjet printer I have.
I do have a laser printer also – but it has no color, and the fractions book my daughter has been using relies on color for a lot of the meaning. I am not sure it would come through was well in b&w.